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package evmrpc_test
import (
"context"
"encoding/hex"
"fmt"
"math/big"
"os"
"strings"
"sync"
"testing"
"time"
"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/export"
"github.com/sei-protocol/sei-chain/app"
"github.com/sei-protocol/sei-chain/app/legacyabci"
"github.com/sei-protocol/sei-chain/evmrpc"
"github.com/sei-protocol/sei-chain/example/contracts/simplestorage"
"github.com/sei-protocol/sei-chain/sei-cosmos/client"
sdk "github.com/sei-protocol/sei-chain/sei-cosmos/types"
receipt "github.com/sei-protocol/sei-chain/sei-db/ledger_db/receipt"
"github.com/sei-protocol/sei-chain/sei-tendermint/rpc/client/mock"
"github.com/sei-protocol/sei-chain/sei-tendermint/rpc/coretypes"
testkeeper "github.com/sei-protocol/sei-chain/testutil/keeper"
"github.com/sei-protocol/sei-chain/x/evm/types"
"github.com/stretchr/testify/require"
)
// brFailClient fails BlockResults; bcFailClient fails Block
type brFailClient struct{ *MockClient }
func (br brFailClient) BlockResults(ctx context.Context, h *int64) (*coretypes.ResultBlockResults, error) {
return nil, fmt.Errorf("fail br")
}
type bcFailClient struct {
*MockClient
first bool
}
func primeReceiptStore(t *testing.T, store receipt.ReceiptStore, latest int64) {
t.Helper()
if store == nil {
return
}
if latest <= 0 {
latest = 1
}
require.NoError(t, store.SetLatestVersion(latest))
require.NoError(t, store.SetEarliestVersion(1))
require.Equal(t, int64(1), store.EarliestVersion())
}
func (bc *bcFailClient) Block(ctx context.Context, h *int64) (*coretypes.ResultBlock, error) {
if !bc.first {
bc.first = true
return bc.MockClient.Block(ctx, h)
}
return nil, fmt.Errorf("fail bc")
}
func TestEstimateGas(t *testing.T) {
Ctx = Ctx.WithBlockHeight(1)
// transfer
_, from := testkeeper.MockAddressPair()
_, to := testkeeper.MockAddressPair()
txArgs := map[string]interface{}{
"from": from.Hex(),
"to": to.Hex(),
"value": "0x10",
"nonce": "0x1",
"chainId": fmt.Sprintf("%#x", EVMKeeper.ChainID(Ctx)),
}
amts := sdk.NewCoins(sdk.NewCoin(EVMKeeper.GetBaseDenom(Ctx), sdk.NewInt(20)))
EVMKeeper.BankKeeper().MintCoins(Ctx, types.ModuleName, amts)
EVMKeeper.BankKeeper().SendCoinsFromModuleToAccount(Ctx, types.ModuleName, sdk.AccAddress(from[:]), amts)
resObj := sendRequestGood(t, "estimateGas", txArgs, nil, map[string]interface{}{})
result := resObj["result"].(string)
require.Equal(t, "0x5208", result) // 21000
resObj = sendRequestGood(t, "estimateGas", txArgs, "latest", map[string]interface{}{})
result = resObj["result"].(string)
require.Equal(t, "0x5208", result) // 21000
resObj = sendRequestGood(t, "estimateGas", txArgs, "0x1", map[string]interface{}{})
result = resObj["result"].(string)
require.Equal(t, "0x5208", result) // 21000
// contract call
_, contractAddr := testkeeper.MockAddressPair()
code, err := os.ReadFile("../example/contracts/simplestorage/SimpleStorage.bin")
require.Nil(t, err)
bz, err := hex.DecodeString(string(code))
require.Nil(t, err)
abi, err := simplestorage.SimplestorageMetaData.GetAbi()
require.Nil(t, err)
input, err := abi.Pack("set", big.NewInt(20))
require.Nil(t, err)
EVMKeeper.SetCode(Ctx, contractAddr, bz)
txArgs = map[string]interface{}{
"from": from.Hex(),
"to": contractAddr.Hex(),
"value": "0x0",
"nonce": "0x2",
"chainId": fmt.Sprintf("%#x", EVMKeeper.ChainID(Ctx)),
"input": fmt.Sprintf("%#x", input),
}
resObj = sendRequestGood(t, "estimateGas", txArgs, nil, map[string]interface{}{})
result = resObj["result"].(string)
require.Equal(t, "0x54ac", result) // 21497
Ctx = Ctx.WithBlockHeight(8)
}
func TestChainConfigReflectsSstoreParam(t *testing.T) {
testApp := app.Setup(t, false, false, false)
baseCtx := testApp.GetContextForDeliverTx([]byte{})
oldCtx, _ := baseCtx.CacheContext()
oldCtx = oldCtx.WithBlockHeight(100).WithIsTracing(true)
newCtx, _ := baseCtx.CacheContext()
newCtx = newCtx.WithBlockHeight(200).WithIsTracing(true)
params := testApp.EvmKeeper.GetParams(newCtx)
params.SeiSstoreSetGasEip2200 = 72000
testApp.EvmKeeper.SetParams(newCtx, params)
primeReceiptStore(t, testApp.EvmKeeper.ReceiptStore(), newCtx.BlockHeight())
oldHeight := oldCtx.BlockHeight()
ctxProvider := func(height int64) sdk.Context {
switch {
case height == evmrpc.LatestCtxHeight:
return newCtx
case height >= newCtx.BlockHeight():
return newCtx
case height == oldHeight:
return oldCtx
default:
return newCtx
}
}
encodingCfg := app.MakeEncodingConfig()
tmClient := &mock.Client{}
watermarks := evmrpc.NewWatermarkManager(tmClient, ctxProvider, nil, testApp.EvmKeeper.ReceiptStore())
backend := evmrpc.NewBackend(
ctxProvider,
&testApp.EvmKeeper,
legacyabci.BeginBlockKeepers{},
func(int64) client.TxConfig { return encodingCfg.TxConfig },
tmClient,
&SConfig,
testApp.BaseApp,
testApp.TracerAnteHandler,
evmrpc.NewBlockCache(3000),
&sync.Mutex{},
watermarks,
)
oldCfg := backend.ChainConfigAtHeight(oldHeight)
require.NotNil(t, oldCfg.SeiSstoreSetGasEIP2200)
require.Equal(t, types.DefaultSeiSstoreSetGasEIP2200, *oldCfg.SeiSstoreSetGasEIP2200)
latestCfg := backend.ChainConfig()
require.NotNil(t, latestCfg.SeiSstoreSetGasEIP2200)
require.Equal(t, uint64(72000), *latestCfg.SeiSstoreSetGasEIP2200)
}
func TestEstimateGasAfterCalls(t *testing.T) {
Ctx = Ctx.WithBlockHeight(1)
// estimate get after set
_, from := testkeeper.MockAddressPair()
amts := sdk.NewCoins(sdk.NewCoin(EVMKeeper.GetBaseDenom(Ctx), sdk.NewInt(20)))
EVMKeeper.BankKeeper().MintCoins(Ctx, types.ModuleName, amts)
EVMKeeper.BankKeeper().SendCoinsFromModuleToAccount(Ctx, types.ModuleName, sdk.AccAddress(from[:]), amts)
_, contractAddr := testkeeper.MockAddressPair()
code, err := os.ReadFile("../example/contracts/simplestorage/SimpleStorage.bin")
require.Nil(t, err)
bz, err := hex.DecodeString(string(code))
require.Nil(t, err)
abi, err := simplestorage.SimplestorageMetaData.GetAbi()
require.Nil(t, err)
call, err := abi.Pack("set", big.NewInt(20))
require.Nil(t, err)
input, err := abi.Pack("get")
require.Nil(t, err)
EVMKeeper.SetCode(Ctx, contractAddr, bz)
txArgs := map[string]interface{}{
"from": from.Hex(),
"to": contractAddr.Hex(),
"value": "0x0",
"nonce": "0x2",
"chainId": fmt.Sprintf("%#x", EVMKeeper.ChainID(Ctx)),
"input": fmt.Sprintf("%#x", input),
}
callArgs := map[string]interface{}{
"from": from.Hex(),
"to": contractAddr.Hex(),
"value": "0x0",
"nonce": "0x2",
"chainId": fmt.Sprintf("%#x", EVMKeeper.ChainID(Ctx)),
"input": fmt.Sprintf("%#x", call),
}
resObj := sendRequestGood(t, "estimateGasAfterCalls", txArgs, []interface{}{callArgs}, nil, map[string]interface{}{})
result := resObj["result"].(string)
require.Equal(t, "0x536d", result) // 21357 for get
Ctx = Ctx.WithBlockHeight(8)
}
func TestCreateAccessList(t *testing.T) {
Ctx = Ctx.WithBlockHeight(1)
_, from := testkeeper.MockAddressPair()
_, contractAddr := testkeeper.MockAddressPair()
code, err := os.ReadFile("../example/contracts/simplestorage/SimpleStorage.bin")
require.Nil(t, err)
bz, err := hex.DecodeString(string(code))
require.Nil(t, err)
abi, err := simplestorage.SimplestorageMetaData.GetAbi()
require.Nil(t, err)
input, err := abi.Pack("set", big.NewInt(20))
require.Nil(t, err)
EVMKeeper.SetCode(Ctx, contractAddr, bz)
txArgs := map[string]interface{}{
"from": from.Hex(),
"to": contractAddr.Hex(),
"value": "0x0",
"nonce": "0x1",
"chainId": fmt.Sprintf("%#x", EVMKeeper.ChainID(Ctx)),
"input": fmt.Sprintf("%#x", input),
}
amts := sdk.NewCoins(sdk.NewCoin(EVMKeeper.GetBaseDenom(Ctx), sdk.NewInt(2000000)))
EVMKeeper.BankKeeper().MintCoins(Ctx, types.ModuleName, amts)
EVMKeeper.BankKeeper().SendCoinsFromModuleToAccount(Ctx, types.ModuleName, sdk.AccAddress(from[:]), amts)
resObj := sendRequestGood(t, "createAccessList", txArgs, "latest")
result := resObj["result"].(map[string]interface{})
require.Equal(t, []interface{}{}, result["accessList"]) // the code uses MSTORE which does not trace access list
resObj = sendRequestBad(t, "createAccessList", txArgs, "latest")
result = resObj["error"].(map[string]interface{})
require.Equal(t, "error block", result["message"])
Ctx = Ctx.WithBlockHeight(8)
}
func TestCall(t *testing.T) {
Ctx = Ctx.WithBlockHeight(1)
_, from := testkeeper.MockAddressPair()
_, contractAddr := testkeeper.MockAddressPair()
code, err := os.ReadFile("../example/contracts/simplestorage/SimpleStorage.bin")
require.Nil(t, err)
bz, err := hex.DecodeString(string(code))
require.Nil(t, err)
abi, err := simplestorage.SimplestorageMetaData.GetAbi()
require.Nil(t, err)
input, err := abi.Pack("set", big.NewInt(20))
require.Nil(t, err)
EVMKeeper.SetCode(Ctx, contractAddr, bz)
txArgs := map[string]interface{}{
"from": from.Hex(),
"to": contractAddr.Hex(),
"value": "0x0",
"nonce": "0x2",
"chainId": fmt.Sprintf("%#x", EVMKeeper.ChainID(Ctx)),
"input": fmt.Sprintf("%#x", input),
}
resObj := sendRequestGood(t, "call", txArgs, nil, map[string]interface{}{}, map[string]interface{}{})
result := resObj["result"].(string)
require.Equal(t, "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", result)
Ctx = Ctx.WithBlockHeight(8)
}
func TestEthCallHighAmount(t *testing.T) {
Ctx = Ctx.WithBlockHeight(1)
_, from := testkeeper.MockAddressPair()
_, to := testkeeper.MockAddressPair()
txArgs := map[string]interface{}{
"from": from.Hex(),
"to": to.Hex(),
"value": "0x0",
"nonce": "0x2",
"chainId": fmt.Sprintf("%#x", EVMKeeper.ChainID(Ctx)),
}
overrides := map[string]map[string]interface{}{
from.Hex(): {"balance": "0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"},
}
resObj := sendRequestGood(t, "call", txArgs, "latest", overrides)
errMap := resObj["error"].(map[string]interface{})
result := errMap["message"]
require.Equal(t, result, "error: balance override overflow")
Ctx = Ctx.WithBlockHeight(8)
}
func TestNewRevertError(t *testing.T) {
err := evmrpc.NewRevertError(&core.ExecutionResult{})
require.NotNil(t, err)
require.Equal(t, 3, err.ErrorCode())
require.Equal(t, "0x", err.ErrorData())
}
func TestConvertBlockNumber(t *testing.T) {
tmClient := &MockClient{}
watermarks := evmrpc.NewWatermarkManager(tmClient, func(i int64) sdk.Context {
if i == evmrpc.LatestCtxHeight {
return sdk.Context{}.WithBlockHeight(1000)
}
return sdk.Context{}
}, nil, nil)
backend := evmrpc.NewBackend(func(i int64) sdk.Context {
if i == evmrpc.LatestCtxHeight {
return sdk.Context{}.WithBlockHeight(1000)
}
return sdk.Context{}
}, nil, legacyabci.BeginBlockKeepers{}, nil, &MockClient{}, nil, nil, nil, evmrpc.NewBlockCache(3000), &sync.Mutex{}, watermarks)
require.Equal(t, int64(10), backend.ConvertBlockNumber(10))
require.Equal(t, int64(1), backend.ConvertBlockNumber(0))
require.Equal(t, int64(1000), backend.ConvertBlockNumber(-2))
require.Equal(t, int64(1000), backend.ConvertBlockNumber(-3))
require.Equal(t, int64(1000), backend.ConvertBlockNumber(-4))
}
func TestPreV620UpgradeUsesBaseFeeNil(t *testing.T) {
// Set up a test context with a height before v6.2.0 upgrade
// For pacific-1 chain, we need to set a height that's before the v6.2.0 upgrade
testHeight := int64(1000) // A height before v6.2.0 upgrade
// Create a new test app to have control over the upgrade keeper
testApp := app.Setup(t, false, false, false)
testCtx := testApp.GetContextForDeliverTx([]byte{}).WithBlockHeight(testHeight)
// Set the chain ID to "pacific-1" to trigger the upgrade check
testCtx = testCtx.WithChainID("pacific-1")
// Set the v6.2.0 upgrade height to a height higher than our test height
// This simulates that the upgrade hasn't happened yet
v620UpgradeHeight := int64(2000)
testApp.UpgradeKeeper.SetDone(testCtx.WithBlockHeight(v620UpgradeHeight), "6.2.0")
// Create a backend with our test context provider
ctxProvider := func(height int64) sdk.Context {
return testCtx.WithBlockHeight(height)
}
config := &evmrpc.SimulateConfig{
GasCap: 10000000,
EVMTimeout: time.Second * 30,
}
tmClient := NewMockClientWithLatest(3000)
watermarks := evmrpc.NewWatermarkManager(tmClient, ctxProvider, nil, testApp.EvmKeeper.ReceiptStore())
backend := evmrpc.NewBackend(
ctxProvider,
&testApp.EvmKeeper,
legacyabci.BeginBlockKeepers{},
func(int64) client.TxConfig { return TxConfig },
tmClient,
config,
testApp.BaseApp,
testApp.TracerAnteHandler,
evmrpc.NewBlockCache(3000),
&sync.Mutex{},
watermarks,
)
// Test HeaderByNumber with a height before v6.2.0 upgrade
header, err := backend.HeaderByNumber(context.Background(), 1000)
require.NoError(t, err)
require.NotNil(t, header)
// For pacific-1 chain before v6.2.0 upgrade, base fee should be nil
require.Nil(t, header.BaseFee, "Base fee should be nil for pacific-1 chain before v6.2.0 upgrade")
// Test with a height after v6.2.0 upgrade
headerAfterUpgrade, err := backend.HeaderByNumber(context.Background(), 2500)
require.NoError(t, err)
require.NotNil(t, headerAfterUpgrade)
// For pacific-1 chain after v6.2.0 upgrade, base fee should not be nil
require.NotNil(t, headerAfterUpgrade.BaseFee, "Base fee should not be nil for pacific-1 chain after v6.2.0 upgrade")
// Test with a different chain ID (not pacific-1)
testCtxDifferentChain := testCtx.WithChainID("test-chain")
ctxProviderDifferentChain := func(height int64) sdk.Context {
return testCtxDifferentChain.WithBlockHeight(height)
}
diffTmClient := NewMockClientWithLatest(3000)
diffWatermarks := evmrpc.NewWatermarkManager(diffTmClient, ctxProviderDifferentChain, nil, testApp.EvmKeeper.ReceiptStore())
backendDifferentChain := evmrpc.NewBackend(
ctxProviderDifferentChain,
&testApp.EvmKeeper,
legacyabci.BeginBlockKeepers{},
func(int64) client.TxConfig { return TxConfig },
diffTmClient,
config,
testApp.BaseApp,
testApp.TracerAnteHandler,
evmrpc.NewBlockCache(3000),
&sync.Mutex{},
diffWatermarks,
)
headerDifferentChain, err := backendDifferentChain.HeaderByNumber(context.Background(), 1000)
require.NoError(t, err)
require.NotNil(t, headerDifferentChain)
// For non-pacific-1 chains, base fee should not be nil regardless of upgrade status
require.NotNil(t, headerDifferentChain.BaseFee, "Base fee should not be nil for non-pacific-1 chains")
}
// Concise gas-limit sanity test
func TestGasLimitUsesConsensusOrConfig(t *testing.T) {
testApp := app.Setup(t, false, false, false)
baseCtx := testApp.GetContextForDeliverTx([]byte{}).WithBlockHeight(1)
ctxProvider := func(h int64) sdk.Context { return baseCtx.WithBlockHeight(h) }
cfg := &evmrpc.SimulateConfig{GasCap: 10_000_000, EVMTimeout: time.Second}
tmClient := &MockClient{}
watermarks := evmrpc.NewWatermarkManager(tmClient, ctxProvider, nil, testApp.EvmKeeper.ReceiptStore())
backend := evmrpc.NewBackend(ctxProvider, &testApp.EvmKeeper,
legacyabci.BeginBlockKeepers{},
func(int64) client.TxConfig { return TxConfig },
tmClient, cfg, testApp.BaseApp, testApp.TracerAnteHandler, evmrpc.NewBlockCache(3000), &sync.Mutex{}, watermarks)
header, err := backend.HeaderByNumber(context.Background(), 1)
require.NoError(t, err)
require.Equal(t, uint64(200_000_000), header.GasLimit)
header2, err := backend.HeaderByNumber(context.Background(), 0)
require.NoError(t, err)
require.Equal(t, uint64(200_000_000), header2.GasLimit)
}
// Gas‐limit fallback tests
func TestGasLimitFallbackToDefault(t *testing.T) {
testApp := app.Setup(t, false, false, false)
baseCtx := testApp.GetContextForDeliverTx([]byte{}).WithBlockHeight(1)
ctxProvider := func(h int64) sdk.Context { return baseCtx.WithBlockHeight(h) }
cfg := &evmrpc.SimulateConfig{GasCap: 20_000_000, EVMTimeout: time.Second}
// Case 1: BlockResults fails
brClient := &brFailClient{MockClient: &MockClient{}}
watermarks1 := evmrpc.NewWatermarkManager(brClient, ctxProvider, nil, testApp.EvmKeeper.ReceiptStore())
backend1 := evmrpc.NewBackend(ctxProvider, &testApp.EvmKeeper, legacyabci.BeginBlockKeepers{}, func(int64) client.TxConfig { return TxConfig }, brClient, cfg, testApp.BaseApp, testApp.TracerAnteHandler, evmrpc.NewBlockCache(3000), &sync.Mutex{}, watermarks1)
h1, err := backend1.HeaderByNumber(context.Background(), 1)
require.NoError(t, err)
require.Equal(t, uint64(10_000_000), h1.GasLimit) // DefaultBlockGasLimit
// Case 2: Block fails
bcClient := &bcFailClient{MockClient: &MockClient{}}
watermarks2 := evmrpc.NewWatermarkManager(bcClient, ctxProvider, nil, testApp.EvmKeeper.ReceiptStore())
backend2 := evmrpc.NewBackend(ctxProvider, &testApp.EvmKeeper, legacyabci.BeginBlockKeepers{}, func(int64) client.TxConfig { return TxConfig }, bcClient, cfg, testApp.BaseApp, testApp.TracerAnteHandler, evmrpc.NewBlockCache(3000), &sync.Mutex{}, watermarks2)
h2, err := backend2.HeaderByNumber(context.Background(), 1)
require.NoError(t, err)
require.Equal(t, uint64(10_000_000), h2.GasLimit) // DefaultBlockGasLimit
}
func TestSimulationAPIRequestLimiter(t *testing.T) {
type testEnv struct {
simAPI *evmrpc.SimulationAPI
args export.TransactionArgs
}
// Helper function to create uint64 pointer
uint64Ptr := func(v uint64) *uint64 { return &v }
newTestEnv := func(t *testing.T) *testEnv {
t.Helper()
// Test setup using a proper context similar to other tests
testCtx := Ctx.WithBlockHeight(1)
// Create a simulation API with a very small request limiter to test rate limiting
ctxProvider := func(height int64) sdk.Context {
if height == evmrpc.LatestCtxHeight {
return testCtx.WithIsTracing(true)
}
return testCtx.WithBlockHeight(height).WithIsTracing(true)
}
// Create a config with a small concurrency limit for reliable testing
config := &evmrpc.SimulateConfig{
GasCap: 1000000,
EVMTimeout: 5 * time.Second,
MaxConcurrentSimulationCalls: 2, // Small limit to easily trigger rate limiting
}
// Use the existing test app from the global setup
testApp := testkeeper.TestApp(t)
watermarks := evmrpc.NewWatermarkManager(&MockClient{}, ctxProvider, nil, EVMKeeper.ReceiptStore())
// Create simulation API
simAPI := evmrpc.NewSimulationAPI(
ctxProvider,
EVMKeeper,
legacyabci.BeginBlockKeepers{},
func(int64) client.TxConfig { return TxConfig },
&MockClient{},
config,
testApp.BaseApp,
testApp.TracerAnteHandler,
evmrpc.ConnectionTypeHTTP,
evmrpc.NewBlockCache(3000),
&sync.Mutex{},
watermarks,
)
// Setup test data - create addresses and fund account
_, from := testkeeper.MockAddressPair()
_, to := testkeeper.MockAddressPair()
// Fund the account for actual transactions
amts := sdk.NewCoins(sdk.NewCoin(EVMKeeper.GetBaseDenom(testCtx), sdk.NewInt(2000000)))
require.NoError(t, EVMKeeper.BankKeeper().MintCoins(testCtx, types.ModuleName, amts))
require.NoError(t, EVMKeeper.BankKeeper().SendCoinsFromModuleToAccount(testCtx, types.ModuleName, from[:], amts))
// Convert to export.TransactionArgs for eth_call
args := export.TransactionArgs{
From: &from,
To: &to,
Value: (*hexutil.Big)(big.NewInt(16)),
Nonce: (*hexutil.Uint64)(uint64Ptr(1)),
}
return &testEnv{
simAPI: simAPI,
args: args,
}
}
t.Run("TestEthCallRateLimiting", func(t *testing.T) {
tEnv := newTestEnv(t)
// Test eth_call rate limiting with concurrent requests
numRequests := 10 // Much more than the limit of 2
results := make(chan error, numRequests)
// Start all requests concurrently to overwhelm the rate limiter
for i := 0; i < numRequests; i++ {
go func() {
_, err := tEnv.simAPI.Call(context.Background(), tEnv.args, nil, nil, nil)
results <- err
}()
}
// Collect all results
var errors []error
for i := 0; i < numRequests; i++ {
errors = append(errors, <-results)
}
// Count successful vs rejected requests
successCount := 0
rejectedCount := 0
for _, err := range errors {
if err == nil {
successCount++
} else if strings.Contains(err.Error(), "eth_call rejected due to rate limit: server busy") {
rejectedCount++
} else {
t.Logf("Unexpected error: %v", err)
}
}
// With only 2 concurrent slots and 10 requests, we should have rejections
require.Greater(t, rejectedCount, 0, "Should have rejected requests due to rate limiting")
require.Greater(t, successCount, 0, "Should have some successful requests")
require.Equal(t, numRequests, successCount+rejectedCount, "All requests should be accounted for")
t.Logf("eth_call rate limiting: %d successful, %d rejected out of %d total", successCount, rejectedCount, numRequests)
})
t.Run("TestEstimateGasRateLimiting", func(t *testing.T) {
tEnv := newTestEnv(t)
// Test eth_estimateGas rate limiting
numRequests := 8
results := make(chan error, numRequests)
// Start all requests concurrently
for i := 0; i < numRequests; i++ {
go func() {
_, err := tEnv.simAPI.EstimateGas(context.Background(), tEnv.args, nil, nil)
results <- err
}()
}
// Collect all results
var errors []error
for i := 0; i < numRequests; i++ {
errors = append(errors, <-results)
}
// Count successful vs rejected requests
successCount := 0
rejectedCount := 0
for _, err := range errors {
if err == nil {
successCount++
} else if strings.Contains(err.Error(), "eth_estimateGas rejected due to rate limit: server busy") {
rejectedCount++
} else {
t.Logf("Unexpected estimateGas error: %v", err)
}
}
// Under constrained scheduling these requests can serialize and avoid
// rejections. The stable invariant is that every response is either success or
// rate-limited. Hence, the assertion for success count instead of rejection
// count. This makes the testing less flaky/more robust given any limit for
// parallelism.
require.Greater(t, successCount, 0, "Should have at least one successful estimateGas request")
require.Equal(t, numRequests, successCount+rejectedCount, "All estimateGas requests should be accounted for")
t.Logf("eth_estimateGas rate limiting: %d successful, %d rejected out of %d total", successCount, rejectedCount, numRequests)
})
t.Run("TestEstimateGasAfterCallsRateLimiting", func(t *testing.T) {
tEnv := newTestEnv(t)
// Test eth_estimateGasAfterCalls rate limiting
numRequests := 2
results := make(chan error, numRequests)
// Create a simple call to use as a precondition
callArgs := export.TransactionArgs{
From: tEnv.args.From,
To: tEnv.args.To,
Value: (*hexutil.Big)(big.NewInt(8)),
Nonce: (*hexutil.Uint64)(uint64Ptr(0)),
}
// Start all requests concurrently
for i := 0; i < numRequests; i++ {
go func() {
_, err := tEnv.simAPI.EstimateGasAfterCalls(context.Background(), tEnv.args, []export.TransactionArgs{callArgs}, nil, nil)
results <- err
}()
}
// Collect all results
var errors []error
for i := 0; i < numRequests; i++ {
errors = append(errors, <-results)
}
// Count successful vs rejected requests
successCount := 0
rejectedCount := 0
for _, err := range errors {
if err == nil {
successCount++
} else if strings.Contains(err.Error(), "eth_estimateGasAfterCalls rejected due to rate limit: server busy") {
rejectedCount++
} else {
t.Logf("Unexpected estimateGasAfterCalls error: %v", err)
}
}
// Should have no rejections within the rate limiting
require.Equal(t, rejectedCount, 0, "Should have no rejected estimateGasAfterCalls requests")
require.Equal(t, numRequests, successCount+rejectedCount, "All estimateGasAfterCalls requests should be accounted for")
t.Logf("eth_estimateGasAfterCalls rate limiting: %d successful, %d rejected out of %d total", successCount, rejectedCount, numRequests)
})
t.Run("TestSequentialRequestsAfterLoad", func(t *testing.T) {
tEnv := newTestEnv(t)
numRequests := 10
results := make(chan error, numRequests)
for i := 0; i < numRequests; i++ {
go func() {
_, err := tEnv.simAPI.Call(context.Background(), tEnv.args, nil, nil, nil)
results <- err
}()
}
// Wait for all concurrent requests to finish
for i := 0; i < numRequests; i++ {
<-results
}
// Give a small amount of time for any ongoing operations to complete
time.Sleep(50 * time.Millisecond)
// Now send sequential requests and ensure they succeed
for i := 0; i < 3; i++ {
_, err := tEnv.simAPI.Call(context.Background(), tEnv.args, nil, nil, nil)
require.NoError(t, err, "Sequential request %d should succeed after rate limiter recovers", i+1)
}
t.Log("Sequential requests after load: all succeeded")
})
t.Run("TestDifferentMethodsShareSameLimiter", func(t *testing.T) {
// Test that different simulation methods share the same rate limiter.
// A single burst can occasionally avoid contention on overloaded CI workers,
// so retry a synchronized burst a few times.
const (
numCallRequests = 20
numEstimateRequests = 20
maxAttempts = 5
)
totalRequests := numCallRequests + numEstimateRequests
runMixedBurst := func(tEnv *testEnv) (int, int) {
results := make(chan error, totalRequests)
start := make(chan struct{})
var wg sync.WaitGroup
// Start mixed requests and release them at once to maximize contention.
for range numCallRequests {
wg.Add(1)
go func() {
defer wg.Done()
<-start
_, err := tEnv.simAPI.Call(context.Background(), tEnv.args, nil, nil, nil)
results <- err
}()
}
for range numEstimateRequests {
wg.Add(1)
go func() {
defer wg.Done()
<-start
_, err := tEnv.simAPI.EstimateGas(context.Background(), tEnv.args, nil, nil)
results <- err
}()
}
close(start)
wg.Wait()
close(results)
successCount := 0
rejectedCount := 0
for err := range results {
if err == nil {
successCount++
} else if strings.Contains(err.Error(), "rejected due to rate limit: server busy") {
rejectedCount++
}
}
return successCount, rejectedCount
}
var (
lastSuccess int
lastRejected int
attemptsUsed int
observedRejection bool
)
for attempt := 1; attempt <= maxAttempts; attempt++ {
attemptsUsed = attempt
lastSuccess, lastRejected = runMixedBurst(newTestEnv(t))
require.Equalf(t, totalRequests, lastSuccess+lastRejected, "All mixed method requests should be accounted for (attempt %d)", attempt)
if lastRejected > 0 {
observedRejection = true
break
}
}
require.Truef(
t,
observedRejection,
"Different methods should share the same rate limiter (last burst: %d successful, %d rejected)",
lastSuccess,
lastRejected,
)
t.Logf(
"Mixed methods rate limiting (attempt %d/%d): %d successful, %d rejected out of %d total",
attemptsUsed,
maxAttempts,
lastSuccess,
lastRejected,
totalRequests,
)
})
t.Run("TestRateLimitErrorFormat", func(t *testing.T) {
tEnv := newTestEnv(t)
// Test the error message format by overwhelming the rate limiter
numRequests := 20
results := make(chan error, numRequests)
// Start requests concurrently to trigger rate limiting
var wg sync.WaitGroup
for range numRequests {
wg.Add(1)
go func() {
defer wg.Done()
_, err := tEnv.simAPI.Call(context.Background(), tEnv.args, nil, nil, nil)
results <- err
}()
}
wg.Wait()
close(results)
// Collect results and check error messages
var rateLimitErrors []error
for err := range results {
if err != nil && strings.Contains(err.Error(), "rejected due to rate limit") {
rateLimitErrors = append(rateLimitErrors, err)
}
}
// Should have at least one rate limit error
require.Greater(t, len(rateLimitErrors), 0, "Should have at least one rate limit error")
// Verify error message format
for _, err := range rateLimitErrors {
require.Contains(t, err.Error(), "eth_call rejected due to rate limit: server busy")
require.Contains(t, err.Error(), "server busy")
}
t.Logf("Found %d rate limit errors with correct format", len(rateLimitErrors))
})
}